Disable use of ResizeObserver for menu auto-update

Resolves #5256 (comment).

We do not have an official browser support policy, but it would be nice to delay relying on `ResizeObserver` for a major bump and make our official browser support policy clear.

I do not believe we anticipate the `ResizeObserver` getting triggered in many situations anyway since the menu itself shouldn't be resizing. The scroll events are much more critical to auto-updating working properly.

packages/react-select/src/components/Menu.tsx

@@ -647,7 +647,8 @@ export const MenuPortal = <
       cleanupRef.current = autoUpdate(
         controlElement,
         menuPortalRef.current,
-        updateComputedPosition
+        updateComputedPosition,
+        { elementResize: false }
       );
     }
   }, [controlElement, updateComputedPosition]);